Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Handle – handle component – or handle adjunct – Luggage-type
Patent
1997-06-11
1998-09-22
Mah, Chuck
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Handle, handle component, or handle adjunct
Luggage-type
30338, 403329, 16DIG41, A47B 9502
Patent
active
058096159
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a handle for household and gardening tools which can be detachably attached to the handle by means of a fastening coupling, the handle-side part of the coupling having a coupling leaf spring which, extending in the longitudinal direction of the handle, has one end fixed in the handle and, with its free end which is pretensioned transverse to the axis of the handle, is movable transversely in an axial recess in the handle and bears a protuberance as locking latch, while the tool-side coupling part has a tool insertion pin which fits in the handle recess and has a locking hole into which the locking latch engages, in which connection a manually actuated release button can act on the leaf spring for unlocking. Such handles and gardening tools for them are used in large number, the fastening coupling creating the possibility of using different gardening tools with the same handle. In the tools used up to now in accordance with Federal Republic of Germany 31 30 703 C2 and Federal Republic of Germany 32 46 887 C2 the coupling arrangement is developed in the manner that the release button is supported for axial displacement or transverse displacement in the handle member and can thus act directly on the end of the coupling spring in order to lift the protuberance which serves as locking latch out of the locking hole of the tool insertion pin. These fastening couplings were designed as pole fastening couplings, in which the gardening tools were fastened to a relatively long pole and the hands grip the pole at a distance from the release button.
However, it has been found that when these known pole fastening couplings are used for relatively short handles, malfunctions can occur insofar as the thumb of the hand gripping the handle member could inadvertently displace or depress the release button, lading to the detachment of the gardening tool. A tool released in such manner could be thrown off upon further use of the handle member, which might even lead to injuries. Unintended unlocking of the coupling could possibly also occur when the tool is thrown off and the release button in unfavorable manner strikes against a hard object.
The purpose of the invention is therefore so to develop a handle of this type that unintentional loosening of the coupling is definitely avoided but intended release is easily possible.
This object is achieved by the features of the invention.
BRIEF DESCRIPTION OF THE DRAWING
The sole FIGURE is an axial selection through a handle developed in accordance with the invention.
DESCRIPTION OF THE INVENTION
Due to the fact that the release button is axially displaceable in the handle end and must be actuated from the end of the handle, contact with the release is out of the question if the gardening tool is used in accordance with its purpose. Even when the tool is placed down, the release button cannot be pushed in by error.
Since the pressing takes place in the direction of the axis of the handle and the coupling leaf spring must be deflected in radial direction in order to remove the protuberance from the locking hole, a deflection member must be provided. In the simplest case, it could be developed as a slide wedge. In such a case, however, there would be no assurance that the radially acting spring force of the leaf spring brings the release button back into the starting position, so that an additional return spring would be necessary here. In order to make such additional spring dispensable and to return the release button into its starting position by the force of the leaf spring, the deflection member is, in accordance with a preferred feature, developed as a rocker arm in the form of an angle lever, on the one lever arm of which a release button acts while the other lever arm is operatively connected with the coupling spring.
One embodiment of the invention will be described below with reference to the drawing.
The handle 10, which consists of two half shells provided with ribbing, has an axial handle recess 12, the rec
REFERENCES:
patent: 4466377 (1984-08-01), Kolb et al.
patent: 5581845 (1996-12-01), Yang
patent: 5604985 (1997-02-01), Andis et al.
patent: 5664792 (1997-09-01), Tseng
Schneider Manfred
Suck Bruno
Mah Chuck
Wolf-Gerate GmbH
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